What Is GHK-Cu?

GHK-Cu (Glycyl-L-Histidyl-L-Lysine copper complex) is a naturally occurring copper-binding tripeptide first isolated from human plasma by Loren Pickart in 1973. It is found in blood, urine, and saliva, and its plasma concentrations are known to decline significantly with age — from approximately 200 ng/mL in young adults to around 80 ng/mL by age 60.

This age-related decline has made GHK-Cu a subject of considerable interest in longevity and skin biology research, with scientists investigating whether supplementary GHK-Cu can restore aspects of youthful cellular function in research models.

All information is provided for educational and research purposes only. GHK-Cu from Meytrix Therapeutics is for in-vitro research use and is not intended for human cosmetic or therapeutic application.

Structure and Mechanism

GHK-Cu consists of three amino acids — glycine, histidine, and lysine — bound to a copper(II) ion. The copper moiety is central to its biological activity; the tripeptide acts as a high-affinity carrier that delivers copper to tissues, facilitating enzymatic processes that depend on copper as a cofactor.

Key mechanisms under investigation in research literature include:

• Collagen and elastin synthesis stimulation: GHK-Cu has been shown in cell culture studies to upregulate genes involved in extracellular matrix (ECM) production, including collagen types I, III, and IV, as well as elastin and proteoglycans.
• Antioxidant and anti-inflammatory signalling: GHK-Cu modulates the activity of superoxide dismutase (SOD) and other antioxidant enzymes. In research models, it has demonstrated downregulation of pro-inflammatory NF-κB pathway activity.
• Wound healing and tissue remodelling: Studies in rodent wound models show accelerated healing with GHK-Cu, attributed to enhanced angiogenesis, fibroblast activation, and keratinocyte migration.
• Gene expression modulation: A landmark study by Pickart et al. identified GHK as a broad gene expression modulator, with the compound influencing over 4,000 human genes — many associated with tissue maintenance, immune regulation, and neurological function.

Research Applications

Skin Biology and Dermatological Research

GHK-Cu is one of the most studied peptides in dermatological research. Key areas include:

• Dermal fibroblast activation and ECM remodelling in aged skin models
• Photo-damage repair mechanisms in UV-exposed cell cultures
• Melanin regulation and skin tone uniformity studies
• Hair follicle biology — GHK-Cu has been studied for its effects on follicle size and hair growth signalling in pre-clinical models

Browse Skin Care and Longevity research peptides →

Longevity and Ageing Research

The decline of GHK-Cu with age has positioned it as a candidate compound in longevity research. Studies have explored:

• Restoration of gene expression patterns associated with younger tissue in aged cell models
• Mitochondrial function support via copper-dependent SOD activation
• Interactions with other longevity-associated pathways (mTOR, AMPK) in cell culture systems

Combination Research: GHK-Cu and Other Peptides

GHK-Cu is frequently studied alongside other peptides in multi-compound research designs targeting skin rejuvenation and systemic longevity. For researchers interested in exploring combined pathways, the Reta Glow Stack → includes compounds relevant to both metabolic and skin research.

Storage and Handling for GHK-Cu Research

• Lyophilised powder: Store at −20 °C, protected from light. GHK-Cu is sensitive to UV exposure; amber vials are recommended.
• Reconstituted solution: Stable at 2–8 °C for up to 4 weeks. The copper-bound form can show a slight blue-green tint in solution — this is normal and expected.
• Reconstitution solvent: Bacteriostatic water is the standard choice. GHK-Cu is highly water-soluble and typically dissolves readily without requiring acidic solvents.

For detailed reconstitution steps, see our complete peptide storage and reconstitution guide →

What the Research Literature Currently Shows

GHK-Cu has an extensive body of pre-clinical and in-vitro research behind it, making it one of the better-characterised cosmetic peptides in the literature. Key findings include demonstrated pro-collagen effects in fibroblast cultures, consistent wound healing acceleration in animal models, and compelling gene expression data suggesting broad tissue-protective activity. Human clinical data remains limited, and most cited effects are derived from cell culture or animal studies.

Researchers are encouraged to consult the primary literature — particularly work by Loren Pickart and more recent meta-analyses of copper peptide studies — when designing GHK-Cu research protocols.

Source GHK-Cu for Your Research

Meytrix Therapeutics supplies high-purity GHK-Cu with Certificate of Analysis documentation for verified purity.

View GHK-Cu →

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GHK-Cu is supplied for in-vitro research use only. Not intended for human cosmetic, therapeutic, or dietary supplementation use.